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6.
What if rate is <50/min or rhythm is irregular ? Count the number of R waves in a 6 second strip and multiply by 10. For example, if there are 7 R waves in a 6 second strip, the heart rate is 70 (7x10=70).

14.
Infarction <ul><li>Clinically significant ST segment elevation is considered to be present if it is greater than 1 mm (0.1 mV) in at least two contiguous precordial leads or in at least two adjacent limb leads. </li></ul>

29.
Ischemia <ul><li>ST depression is defined by an ST segment which is depressed >1 mm below the baseline </li></ul><ul><li>Typically there are ST segment changes associated with T wave flattening or inversion; isolated T wave changes are not usually seen with ischemia. </li></ul>

32.
Abnormal Q wave <ul><li>According to the new criteria, an abnormal Q wave is any Q wave in leads V1 to V3 or a Q wave 30 msec in leads I, II, aVL, aVF, or V4 to V6; the Q wave must be present in any two contiguous leads and 1 mm in depth. </li></ul><ul><li>(European Society of Cardiology (ESC) and American College of Cardiology (ACC) 2000) </li></ul>